right...
Huge deal is how pressure affects the amount of air that can be dissolved in the water. This is HUGE in the event of a DWC, the temperature of your res water becomes one of your top priorities. At sea level the plants can tolerate a res temp of 75 deg but at high altitudes 5kfeet you need to lower the res temp and keep it in the mid to high 60s in order to saturate the roots with oxygen; WHICH is the point of hydro in general, to supply the roots with more oxygen.
The point of all this, the extra "stuff" you need to consider is a res chiller. When your res temps hit the mid-high 70s and your plants start showing nute toxicity it will be the cause. High altitude hydro requires special attention to the res oxygen content, temp is crucial!!!
It matters dammit... and im not a hydro guy nor do I grow at high altitude
. I thought about it a TON and formed a hypothesis that due to the lower atmospheric pressure on the surface of the solution, the solution may retain a different percentage of dissolved O2. So if I read you correctly;
